EP0552272A1 - Gear wheels rolled from powder metal blanks. - Google Patents
Gear wheels rolled from powder metal blanks.Info
- Publication number
- EP0552272A1 EP0552272A1 EP91919365A EP91919365A EP0552272A1 EP 0552272 A1 EP0552272 A1 EP 0552272A1 EP 91919365 A EP91919365 A EP 91919365A EP 91919365 A EP91919365 A EP 91919365A EP 0552272 A1 EP0552272 A1 EP 0552272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear wheel
- blank
- depth
- die
- microns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000843 powder Substances 0.000 title claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 claims description 23
- 238000000280 densification Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000007792 addition Methods 0.000 claims description 5
- 238000005275 alloying Methods 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/08—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of toothed articles, e.g. gear wheels; of cam discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
- B21H5/022—Finishing gear teeth with cylindrical outline, e.g. burnishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
- B22F3/1109—Inhomogenous pore distribution
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
- B22F3/164—Partial deformation or calibration
- B22F2003/166—Surface calibration, blasting, burnishing, sizing, coining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Definitions
- This invention relates to a method of producing gear wheels from powder metal blanks.
- the invention is particularly concerned with achieving a degree of surface hardness which enables such gear wheels to be sufficiently wear resistant for use in heavy duty applications.
- Particular applications contemplated are for power transmission such as in vehicle gear boxes where high loadingis and speeds must be accommodated.
- Gears formed from sintered powder metal blanks are well known.
- British Patent Specification No. 1125952 discloses a method of producing gear wheels from powder metal blanks in which, after pressing the powder and sintering, the gear wheel is rolled to properly size the teeth and teeth root diameters. The manufacture of both spur and helical gears is contemplated.
- a primary problem with gear wheels formed from powder metal blanks is that when compared with gears machined from bar stock, castings or forgings, powder metal gear wheels have reduced bending fatigue strength in the tooth root region, and low wear .resistance on the tooth flanks due to the residual porosity in the microstructure. For these reasons, while powder metal gear wheels can be used in low stress applications such as oil pumps, they were not suitable for power transmission. As power transmission applications use predominantly helical gears, there has been very little use of helical gears made from powder metal blanks in highly loaded transmission applications.
- a gear wheel formed from a pressed and sintered powder metal blank is surface hardened by rolling in the tooth, root and flank regions to establish densification in the range of 90 to 100 percent to a depth of at least 380 microns.
- the core density; ie below the densified regions, is usually substantially uniform, typically at around 90 percent.
- the depth of densification is in the range 380 to 500 microns. We have found that little additional benefit is achieved if the depth of densification exceeds 1000 microns.
- the density at the surface is substantially 100%, and remains at a density no less than 90% at least to the minimum depth specified.
- the rate at which the density reduces with respect to depth is normally at least linear; ie, the minimum density in the hardened regions is directly inversely proportional to the depth. Usually, the density at least in regions closer to the surface will be significantly greater than this minimum value. Typically, the rate of density reduction will be very low at the surface and increase uniformly towards the maximum depth of the hardened regions. Thus the density might vary in relation to the square or a higher power of the depth.
- the metal powders used in gears according to the invention will be selected according to the eventual application, and can include low alloy steel grades similar to those used in the manufacture of high performance gears from other forms of metal.
- the powders can be either admixed elemental iron plus alloying additions, or fully pre-alloyed powders.
- Typical fully pre-alloyed powders would be of a composition such as AISI 4600 and its derivatives.
- Admixed powders have the advantage of being more compressible, enabling higher densities to be reached at the compaction stage.
- the use of admixed powders enables compositions to be tailored to specific applications. For example, elemental powders may be blended together with a lubricant to produce, on sintering, low alloy gears of compositions similar to SAE 4100, SAE 4600, and SAE 8600 grades.
- Elemental powder additions to the base iron can include Carbon, Chromium, Molybdenum, Manganese, Nickel, Copper, and Vanadium. Again, quantities of the additives will vary with different applications, but will normally be.no more than 5 percent by weight in each case.
- a preferred admixed powder composition in gears according to the invention has the following composition by weight:
- Molybdenum 0.5% the balance being iron and unavoidable impuritives. It will be recognised that the use of Chromium, Molybdenum and Manganese in the formation of a sintered powder metal blank requires a sintering process which can minimise their oxidation.
- a preferred process used in this invention is to sinter at high temperature up to 1350 * C in a very dry Hydrogen/Nitrogen atmosphere, for example at a dew point of -40*C. This has the additional benefit of further improving mechanical properties and reducing oxygen levels to approximately 200ppm.
- the alloying addition powders used in gears according to the invention will preferably have a particle size in the range 2 to 10 microns.
- particle sizes in this range can be achieved by fine grinding of ferroalloys in an appropriate inert atmosphere. Prevention of oxidation of readily oxidisable alloying powders at the grinding stage can be critical to the achievement of the degrees of densification referred to above.
- Densification of the operative surface layer of a powder metal gear as specified above may be accomplished in a number of rolling techniques. These may employ either a single die or twin die rolling machine, and may include sep ⁇ rate and/or simultaneous root and flank rolling.
- the or each rolling die is normally in the form of a mating gear made from hardened tool steel. In use, the die is engaged with the sintered gear blank, and as the two are rotated their axes are brought together to compact and roll the selected areas of the blank surface. When a predetermined axle spacing has been reached, rotation only will usually continue for a given number of gear revolutions, or dwell time, and then the two parts will be withdrawn from one another.
- the predetermined axle spacing will of course depend on the size of the gear and die as well as the material of the blank and the desired densification. Typically, the respective rolled surface will be compacted by around 120 microns.
- - Figure l is a partially broken side elevation of a single die rolling machine
- - Figure 2 is a partially broken side elevation of a twin die rolling machine
- FIG. 1 - and Figures 3 to 5 are detailed views showing different die geometries used for different rolling functions.
- the powder metal blank 2 is showed mounted on a fixed axle 4, itself supported on a frame 6.
- a die 8 is rotatably mounted on an axle 10 supported on a carriage 12 which is slidably mounted on the frame 6.
- the carriage 12 is movable on the frame 6 towards and away from the axle 4 to bring the die 8 into and out of engagement with the alloy metal blank 2.
- Such movement is imparted to the carriage 12 by an mechanism, details of which are omitted.
- the carriage 12 is constrained to move relative to the frame 6 along a linear path, and the degree of permitted advance is limited by a stop 14.
- a drive mechanism (not shown) for rotating the die 8 above the axis 10.
- the drive mechanism may comprise a simple motor coupled to an appropriate wheel for engaging the teeth of the die.
- the drive mechanism should be operable to rotate the die 8 in both senses.
- the powder metal blank is mounted on the axle 4, and the appropriate die mounted on the axle 10, and suitably coupled to the drive mechanism.
- the carriage 12 is advanced to engage the teeth of the die to the teeth of the blank, when the drive mechanism is actuated to rotate both the die and the blank in mesh with one another.
- the carriage continues to advance and the teeth of the die 8 roll and densify the respective surface.', of the blank 2 with which they are in contact.
- the carriage advances up to a full depth position defined by the stop 14. Rolling continues at this depth for a predetermined period of time or number of revolutions of the blank, and the carriage is then withdrawn still with the die and blank rotating.
- the rotation of the die and blank may be reversed on a number of occasions. Intermittent reversal throughout the process may be appropriate, and the frequency of such reversals can be set by numbers of rotations of the die or the blank.
- the machine of Figure 2 operates in a substantially similar manner to that of Figure 1, and corresponding parts are similarly identified.
- the machine of Figure 2 has a pair of dies 8 operating simultaneously of the same blank 2. Advance and retraction of the carriages 12 is synchronised by means of a simple lever system 16. In other respects the same criteria may be adopted as are described above with reference to Figure 1. Additionally of course, the rotation of the dies 8 must be synchronised. Although it is possible to use only a single drive mechanism coupled to one of the dies, ..it is normally preferred to use two, synchronised electronically.
- flank rolling only is illustrated.
- the flanks of the die teeth 18 roll and wipe against the flanks of the blank teeth 20 as the carriage or carriages 12 advance towards the blank axis.
- the material at the surface of the flanks of the blank teeth 20 is compacted to form the densified layer 22.
- the tip of a die tooth 18 engage the root of the blank teeth 20. This is ensured by the stop 14.
- the profiles of the die teeth 18 and the blank teeth 20 are selected to ensure that no such contact is made while nevertheless achieving the desired compaction in the regions 22.
- the depth of rolling can also be adjusted by means of the stop mechanism 14, and this too will be a controlling factor in the process.
- different die teeth profiles can be used either separately or simultaneously on the same blank to achieve the required densification and in this context it should be noted that different degrees of densification of the blank may be desired in different regions depending upon the eventual use of the manufactured gear. Densification at the root is desirable to enhance the bending strength; ie, prevent the teeth from breaking away from the body of the gear. Densification along the flank is desirable for wear resistance.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Powder Metallurgy (AREA)
- Gears, Cams (AREA)
Abstract
On fabrique une roue dentée à partir d'une ébauche de métal en poudre comprimée et frittée en trempant la surface des régions de la denture, de la base et des flancs pour augmenter la densité de 90 à 100 % à une profondeur d'au moins 380 microns.A gear wheel is made from a pressed and sintered powder metal blank by surface hardening the tooth, base and flank regions to increase the density by 90-100% to a depth of at least 380 microns.
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9021833A GB2250227B (en) | 1990-10-08 | 1990-10-08 | Gear wheels rolled from powder metal blanks |
GB9021833 | 1990-10-08 | ||
PCT/GB1991/001742 WO1992005897A1 (en) | 1990-10-08 | 1991-10-08 | Gear wheels rolled from powder metal blanks |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0552272A1 true EP0552272A1 (en) | 1993-07-28 |
EP0552272B1 EP0552272B1 (en) | 1994-12-07 |
Family
ID=10683380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91919365A Expired - Lifetime EP0552272B1 (en) | 1990-10-08 | 1991-10-08 | Gear wheels rolled from powder metal blanks |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0552272B1 (en) |
JP (1) | JPH06501988A (en) |
AU (1) | AU8669391A (en) |
CA (1) | CA2070180C (en) |
DE (1) | DE69105749T2 (en) |
ES (1) | ES2065711T3 (en) |
GB (1) | GB2250227B (en) |
WO (1) | WO1992005897A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1063032A1 (en) * | 1999-06-22 | 2000-12-27 | M.G. - MINI GEARS S.p.A. | Method for producing gear wheels from blanks obtained by sintering metal powders |
WO2006131348A2 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Holding Gmbh | Blank geometry of an undersized gear made of sintered material |
WO2006131356A2 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Holding Gmbh | Work piece having different qualities |
WO2006131353A2 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Holding Gmbh | Automotive component comprising a toothed section having asymmetrical surface compression |
CZ299187B6 (en) * | 1997-10-30 | 2008-05-14 | Miba Sintermetall Aktiengesellschaft | Method of producing gear wheel from powder metal blank and apparatus for making the same |
US8069696B2 (en) | 2006-05-04 | 2011-12-06 | Miba Sinter Austria Gmbh | Method for producing a gear wheel |
US8783080B2 (en) | 2007-03-28 | 2014-07-22 | Miba Sinter Austria Gmbh | Method and device for machining a toothing on a sintered part |
US8984981B2 (en) | 2010-08-31 | 2015-03-24 | Miba Sinter Austria Gmbh | Sintered gearwheel |
EP4272888A1 (en) * | 2022-05-05 | 2023-11-08 | Volvo Car Corporation | Gear component |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0990709B1 (en) * | 1992-08-19 | 2007-03-07 | The Penn State Research Foundation | Apparatus and method for precision gear finishing by controlled deformation |
US5390414A (en) * | 1993-04-06 | 1995-02-21 | Eaton Corporation | Gear making process |
US5729822A (en) * | 1996-05-24 | 1998-03-17 | Stackpole Limited | Gears |
SE9602376D0 (en) * | 1996-06-14 | 1996-06-14 | Hoeganaes Ab | Compact body |
JP3401164B2 (en) * | 1997-06-27 | 2003-04-28 | トヨタ自動車株式会社 | Sintered gear coarse material |
DE19850326A1 (en) * | 1998-11-02 | 2000-05-04 | Gkn Sinter Metals Holding Gmbh | Process for producing a sintered component with reshaping of the green body |
GB2360825B (en) | 2000-03-30 | 2004-11-17 | Formflo Ltd | Gear wheels roll formed from powder metal blanks |
SE0002448D0 (en) | 2000-06-28 | 2000-06-28 | Hoeganaes Ab | method of producing powder metal components |
AT409466B (en) * | 2000-11-30 | 2002-08-26 | Miba Sintermetall Ag | METHOD AND DEVICE FOR PRODUCING A GEAR |
US7641850B2 (en) * | 2003-03-18 | 2010-01-05 | The Penn State Research Foundation | Method and apparatus for strengthening of powder metal gears by ausforming |
US7416696B2 (en) | 2003-10-03 | 2008-08-26 | Keystone Investment Corporation | Powder metal materials and parts and methods of making the same |
AT412955B (en) * | 2003-12-19 | 2005-09-26 | Miba Sinter Austria Gmbh | METHOD FOR MANUFACTURING A GEAR WHEEL |
AT501430B8 (en) * | 2005-05-17 | 2007-02-15 | Miba Sinter Austria Gmbh | METHOD FOR MANUFACTURING A CHAIN WHEEL |
DE102005027140A1 (en) * | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Gmbh | Gearing with adapted sintered material |
DE102005027137A1 (en) * | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Gmbh | Gearing made of sintered material |
DE102005027144A1 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Gmbh | Surface compaction of a toothing |
DE102005027048A1 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Gmbh | Sintered tooth element with locally selective surface compaction |
DE102005027049A1 (en) * | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Gmbh | Resilient gearing |
DE102005027907A1 (en) * | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Gmbh | Forged toothing |
DE102006028184B4 (en) * | 2006-06-16 | 2011-08-18 | GKN Sinter Metals Holding GmbH, 42477 | Process for producing at least partially surface-compacted workpieces by rolling to final gauge |
AT505150B1 (en) * | 2006-10-24 | 2008-11-15 | Miba Sinter Austria Gmbh | multiple wheel |
AT508990B1 (en) * | 2009-11-10 | 2012-04-15 | Miba Sinter Austria Gmbh | ROLLING TOOL |
WO2013136983A1 (en) | 2012-03-12 | 2013-09-19 | Ntn株式会社 | Mechanical structural component, sintered gear, and methods for producing same |
CN104152650A (en) * | 2014-08-28 | 2014-11-19 | 武汉大学 | Device for preparing gradient nanometer layer on surface of metal material by using rolling deformation |
JP2016172931A (en) * | 2016-05-12 | 2016-09-29 | Ntn株式会社 | Machine component and method for manufacturing the same |
AT15793U1 (en) | 2017-05-16 | 2018-07-15 | Miba Sinter Austria Gmbh | Method for compacting the internal toothing of a toothed wheel |
JP6859225B2 (en) * | 2017-07-26 | 2021-04-14 | トヨタ自動車株式会社 | Manufacturing method of sintered gear |
AT520315B1 (en) | 2018-01-24 | 2019-03-15 | Miba Sinter Austria Gmbh | Process for producing a sintered component |
JP7127296B2 (en) | 2018-02-23 | 2022-08-30 | トヨタ自動車株式会社 | Gear manufacturing method and manufacturing apparatus |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1125952A (en) * | 1965-03-03 | 1968-09-05 | Birmingham Small Arms Co Ltd | Improvements in or relating to the production of gear wheels |
GB1384388A (en) * | 1971-11-08 | 1975-02-19 | Formflo Ltd | Rolling machines |
US4059879A (en) * | 1975-11-17 | 1977-11-29 | Textron Inc. | Method for the controlled mechanical working of sintered porous powder metal shapes to effect surface and subsurface densification |
GB1532641A (en) * | 1976-04-27 | 1978-11-15 | British Steel Corp | Alloy steel powders |
US4394421A (en) * | 1979-07-09 | 1983-07-19 | Textron Inc. | Thread forming of sintered porous metal shapes |
US4708912A (en) * | 1984-07-18 | 1987-11-24 | Sintermetallwerk Krebsoege Gmgh | Sintered metal body with at least one toothing |
JPH02138554A (en) * | 1988-11-16 | 1990-05-28 | Nissan Motor Co Ltd | Highly strenghtened gear |
-
1990
- 1990-10-08 GB GB9021833A patent/GB2250227B/en not_active Expired - Lifetime
-
1991
- 1991-10-08 AU AU86693/91A patent/AU8669391A/en not_active Abandoned
- 1991-10-08 CA CA002070180A patent/CA2070180C/en not_active Expired - Lifetime
- 1991-10-08 DE DE69105749T patent/DE69105749T2/en not_active Expired - Lifetime
- 1991-10-08 JP JP3516455A patent/JPH06501988A/en active Pending
- 1991-10-08 EP EP91919365A patent/EP0552272B1/en not_active Expired - Lifetime
- 1991-10-08 WO PCT/GB1991/001742 patent/WO1992005897A1/en active IP Right Grant
- 1991-10-08 ES ES91919365T patent/ES2065711T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
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See references of WO9205897A1 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ299187B6 (en) * | 1997-10-30 | 2008-05-14 | Miba Sintermetall Aktiengesellschaft | Method of producing gear wheel from powder metal blank and apparatus for making the same |
EP1063032A1 (en) * | 1999-06-22 | 2000-12-27 | M.G. - MINI GEARS S.p.A. | Method for producing gear wheels from blanks obtained by sintering metal powders |
WO2006131348A2 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Holding Gmbh | Blank geometry of an undersized gear made of sintered material |
WO2006131356A2 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Holding Gmbh | Work piece having different qualities |
WO2006131353A2 (en) | 2005-06-10 | 2006-12-14 | Gkn Sinter Metals Holding Gmbh | Automotive component comprising a toothed section having asymmetrical surface compression |
DE102005027050B4 (en) | 2005-06-10 | 2021-12-30 | Gkn Sinter Metals Gmbh | Motor vehicle component with toothing |
US8069696B2 (en) | 2006-05-04 | 2011-12-06 | Miba Sinter Austria Gmbh | Method for producing a gear wheel |
US8783080B2 (en) | 2007-03-28 | 2014-07-22 | Miba Sinter Austria Gmbh | Method and device for machining a toothing on a sintered part |
US8984981B2 (en) | 2010-08-31 | 2015-03-24 | Miba Sinter Austria Gmbh | Sintered gearwheel |
EP4272888A1 (en) * | 2022-05-05 | 2023-11-08 | Volvo Car Corporation | Gear component |
Also Published As
Publication number | Publication date |
---|---|
CA2070180C (en) | 1999-02-16 |
CA2070180A1 (en) | 1992-04-09 |
GB2250227A (en) | 1992-06-03 |
WO1992005897A1 (en) | 1992-04-16 |
JPH06501988A (en) | 1994-03-03 |
DE69105749T2 (en) | 1995-05-24 |
GB9021833D0 (en) | 1990-11-21 |
ES2065711T3 (en) | 1995-02-16 |
EP0552272B1 (en) | 1994-12-07 |
DE69105749D1 (en) | 1995-01-19 |
GB2250227B (en) | 1994-06-08 |
AU8669391A (en) | 1992-04-28 |
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